How does this do with EMI interference? My biggest complaint with my current Styleaudio product is that it can pick up EMI pretty easily, with my phone on the other side of the desk it's definitely present (I often have to throw my phone on my bed to get rid of it). Otherwise, it looks like a good step up for me, so I'm curious.

I guess you are using Styleaudio Peridot, anyway that is really odd. I used two Rubys and now switched to Sapphire. But no EMI problem at all. If there was, I should have heard that noise with my SE530. I do not know the sound of Peridot, but changing to Ruby will be definitely an upgrade.